<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
            <dl>
                <dt>
                <span class="c-999 fsize14">课程类别</span>
                </dt>
                <dd class="c-s-dl-li">
                <ul class="clearfix">
                    <li>
                    <a title="全部" href="javascript:void(0);" @click="searchOne('')">全部</a>
                    </li>
                    <li v-for="(item,index) in subjectNestedList" v-bind:key="index" :class="{active:oneIndex==index}">
                    <a :title="item.title" href="javascript:void(0);" @click="searchOne(item.id, index)">{{item.title}}</a>
                    </li>
                </ul>
                </dd>
            </dl>
            <dl>
                <dt>
                <span class="c-999 fsize14"/>
                </dt>
                <dd class="c-s-dl-li">
                <ul class="clearfix">
                    <li v-for="(item,index) in subSubjectList" v-bind:key="index" :class="{active:twoIndex==index}">
                    <a :title="item.title" href="javascript:void(0);" @click="searchTwo(item.id, index)">{{item.title}}</a>
                    </li>
                </ul>
                </dd>
            </dl>
            <div class="clear"/>
            </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li>
                <a title="关注度" href="#">关注度</a>
              </li>
              <li>
                <a title="最新" href="#">最新</a>
              </li>
              <li class="current bg-orange">
                <a title="价格" href="#">价格&nbsp;
                  <span>↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
            <section class="no-data-wrap" v-if="data.total==0">
                <em class="icon30 no-data-ico">&nbsp;</em>
                <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
            </section>
          <!-- /无数据提示 结束-->
          <!-- 数据列表 开始-->
            <article v-if="data.total>0" class="comm-course-list">
                <ul id="bna" class="of">
                    <li v-for="item in data.items" :key="item.id">
                        <div class="cc-l-wrap">
                            <section class="course-img">
                                <img :src="item.cover" class="img-responsive" alt="听力口语">
                                <div class="cc-mask">
                                    <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                                </div>
                            </section>
                            <h3 class="hLh30 txtOf mt10">
                                <a :href="'/course/'+item.id" :title="item.title" class="course-title fsize18 c-333">{{ item.title }}</a>
                            </h3>
                            <section class="mt10 hLh20 of">
                                <span v-if="Number(item.price) === 0" class="fr jgTag bg-green">
                                    <i class="c-fff fsize12 f-fA">免费</i>
                                </span>
                                <span class="fl jgAttr c-ccc f-fA">
                                    <i class="c-999 f-fA">{{ item.viewCount }}人学习</i>
                                    |
                                    <i class="c-999 f-fA">9634评论</i>
                                </span>
                            </section>
                        </div>
                    </li>
                </ul>
                <div class="clear"/>
            </article>
            <!-- /数据列表 结束-->
        </div>
        <!-- 公共分页 开始 -->
        <div>
        <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="首页"
            @click.prevent="gotoPage(1)">首</a>
            <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="前一页"
            @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
            v-for="page in data.pages"
            :key="page"
            :class="{current: data.current == page, undisable: data.current == page}"
            :title="'第'+page+'页'"
            href="#"
            @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="后一页"
            @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="末页"
            @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
        </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import course from '@/api/course'

export default {

  data () {
    return {
      page:1,
      data:{},
      subjectNestedList: [], // 一级分类列表
      subSubjectList: [], // 二级分类列表
      searchObj: {}, // 查询表单对象
      oneIndex:-1,
      twoIndex:-1,
      buyCountSort:"",
      gmtCreateSort:"",
      priceSort:""
    }
  },

  //加载完渲染时
  created () {
    //获取课程列表
    this.initCourse()

    //获取分类
    this.initSubject()
  },

  methods: {
    //查询课程列表
    initCourse(){
      course.getPageList(1, 8,this.searchObj).then(response => {
        this.data = response.data.data
      })
    },
    //查询所有一级分类
    initSubject(){
      //debugger
      course.getNestedTreeList2().then(response => {
        this.subjectNestedList = response.data.data.items
      })
    },
    
    //点击一级分类，显示对应的二级分类，查询数据
    searchOne(subjectParentId, index) {
      //debugger
      this.oneIndex = index
      this.twoIndex = -1

      this.searchObj.subjectId = "";
      this.subSubjectList = [];

      this.searchObj.subjectParentId = subjectParentId;
      this.gotoPage(this.page)

      for (let i = 0; i < this.subjectNestedList.length; i++) {
        if (this.subjectNestedList[i].id === subjectParentId) {
          this.subSubjectList = this.subjectNestedList[i].children
        }
      }
    },

    //点击二级分类，查询数据
    searchTwo(subjectId, index) {
      this.twoIndex = index
      this.searchObj.subjectId = subjectId;
      this.gotoPage(this.page)
    },
    //购买量查询
    searchBuyCount() {
      this.buyCountSort = "1";
      this.gmtCreateSort = "";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //更新时间查询
    searchGmtCreate() {
      debugger
      this.buyCountSort = "";
      this.gmtCreateSort = "1";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //价格查询
    searchPrice() {
      this.buyCountSort = "";
      this.gmtCreateSort = "";
      this.priceSort = "1";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //分页查询
    gotoPage(page) {
      this.page = page
      course.getPageList(page, 8, this.searchObj).then(response => {
        this.data = response.data.data
      })
    }
  }
}
</script>
<style scoped>
  .active {
    background: #bdbdbd;
  }
  .hide {
    display: none;
  }
  .show {
    display: block;
  }
</style>